bartholomew



2 Sheets-Sheet l.

(No Model.)

A. W. BARTHOLOMBW.

DIE STOCK.

Patented Jan. 8, 1889 'lllfflL/l N. PETERS, Phmu-Lilmmphur, wnhinmun. D. C.

(No Model.) 2 Sheets-Sheet 2.

A. W. BARTHOLOMEW.

DIE STOGK..

Patented Jan.' 8, 1889.

N. PUENS PhnlO-Lilhognpwf Washington. D. C.

UNITED STATES PATENT FFICIE ALBERT IV. BARTHOLOMEVV, OF BOSTON, MASSACHUSETTS, ASSIGrNOR OF ONE-THIRD TO THOMAS O. ASHLEY, OF SAME PLACE.

DI-STOCK.

SPECFCATION' forming part of Letters Patent No. 395,686, dated. January 8, 1889. Application filed March 23, 1888. Serial No. 268,264. (No model.)

T all wwm it may OOwYW/r this constructionI produce a device by which Be it known that I, ALBERT NV. BARTHOLO- the work to be done is not only done much MEW, of Boston, in the county ot' Su tfolk and more quickly than heretofore, but is also done State of Massachusetts, have invented a new in a much better manner than heretofore, be-

and useful Improvement in Cutting-Oft' and cause cach tool during its operation resists 55 Thread-Cutting Devices, of which the followthe pressure of the othertool. This is an i1ning is a specification, reference being had to portant feature of my invention, and is of the accompanying drawings, in whichgreat practical importance whether the tools Figure l is a 'plan of my device with the in the carriers be,for example, the threadecutto chuck removed. Fig. 2 is a section ou line 2 ting dies B or the cutters 60 2 of Fig. l. Fig. 3 is a plan, Fig. 4 an edge In order to connect thc chuck. and tool-carview, and Fig. 5 an end view, of a detached rying stock in such wise that the stock can be carrier, full size, provided with an ordinary rotated on the chuck, support d4 of the chuck threaded cutting-die- Fig. G is a plan ot' my is provided with a ring, of, having a groove,

device provided with a chuck. Fig. 7 is an at, into which fit plates al, secured on stock 65 obverse plan of what is shown in Fig. l5. Fig. A, ring arq on stock A fitting into ring a and S is a section on line 8 S of Fig. 7. Fig. 9 is serving as a support therefor. This combia plan of a portion ot' the stock of my device, nation of a chuck and a tool-carrying device, showing the cutters in the carriers and the which is so connected to the chuck as to be 2o plates which secure the stock and chuck torotated thereon, is another important feature 7o gether. Fig. T10 is an edge view of the preof my invention. Eerred form ot chuck with the cover removed. Portions l l and 2 2 of the recess o. insteek M' y new tool is an improvement on that pat- A are preferably respectively parallel to each cnted by my 1 atent, No. 320,748, dated June other to receive. carriers A', foi-ined with 23, ISS; and my invention consists, tirst, in straight parallel edges 3, so as to slide easily 75 a device made up of a stock having a hole in the lengthwise recess a. This is a minor through it (to receive the material to be operfeature of my invention. ated on) and tool-carriers mounted on opposite Another feature ot my invemtion lies in the sides ot' the opening and adapted to be moved combination of the carriers with a torked plate,

3o toward each other to bring the tools into cona, between the arms cr" ol? which the dies B are 8o tact with opposite portions of thematerial opreceived. By this cmistructiou I am enabled erated on, whereby each tool resists the pressto use dies of the standard size, the arms uw ure ot the other during their operation; secfitting in the grooves in the edgcsot the dies. ondly, in the combination of a tool-carrying The plates a" are clamped to thc carriers by 3 5 stock and a chuck, the stock and chuck, being' clamps a al?, by means of which. cutters I) are 85 so connected together that the chuck may be also clamped in place, an edge ot' each clamp kept stationary and the stock rotated on it; du overlapping each cutter and clamping the and also in certain details ot' construction cutter :firmly to its carrier A, as shown inl hereinafter described and claimed. Fig. `9, and as will be plainly understood by 4o In the drawings, A is a stock, and A the reference to Fig. 5, in which a cutter, how- 9o tool-carriers, which are mounted on opposite ever, is not shown. I sides of an opening, a, in stock A, and are The best form of chuck known to me for adapted to be moved toward each other to use in combination with tool-carrying stock bring the tools carried by them into contact A is the chuck illustrated in the drawings,

with the material to be operated on. Carriers wherein jaws am of the chuck are shown 9 5 A are preferably mounted, as shown, in aremounted in. f 'ame al, one jaw being secured cess, d', in stock A, and are moved toward and at one end of the frame, and the other jaw from each other by screw-rods a?, which are being carried by a screw, a, through the provided vwith handles A2. Recess a is prefframe al". Screw o is a right and left hand 5o erably provided with a cover, as shown. By screw and passes through the support a4, in roe the plates a" properly adjusted.

which the screw is journaled, to carry one of the jaws als toward the jaw on the screw, and at the same time the jaw carried by the screw is moved toward the other jaw. Support a preferably forms part of the chuck-case, as shown.

The operation of my device is as follows: lVhen it is to be used for cutting a thread, the jaws of the chuck are moved out of the way, or the chuck is removed by unelamping the plates a7 and swinging them out to release the chuck. rlhread-cutting dies are inserted and Stock A is then rotated on the material operated on, the dies B being kept in proper contact with the material by turning the screws A2. Then the thread is cut, dies B are moved away from each other and the material released. j Then the device is to be used as a cutting-off device, dies B are removed and cutters I) clamped on the carriers. The jaws of the chuck are clamped on the material to be operated on, and, owing' to the construction and arrangement of the chuck, as above described, the material is very nicely centered for the operation of the cutters D, which are driven inwardly toward each other by sliding the carriers, as explained. The clamping of the device on the material prevents the cutters from moving sidewise and making false cuts.

I am aware of Saunderss patent, No. 317 ,022, dated May 5, 1885, and Burins patent, No. 225,048, dated March 2, 1880, and disclaim all that is shownin them, devices embodying my invention differing radically from Saunderss device, in that the tool-carriers in my device are connected directly to screw-rods, by the rotation of which in one direction the toolcarriers are moved inwardly, being moved outwardly by rotating' the screw-rod in the opposite direction. The tool-carriers in Saunderss patent are moved inwardly by screws, which push against them, and they are then clamped in position by a set-screw. To move the tool-carrier in the opposite direction it is necessary to loosen the set-screw, turn back ythe iirst-mentioned screw, and then slide the tool-carrier back by the fingers.

Devices embodying my invention differ radically from the device shown in Burins patent, in that that portion of my device which carries the knives is of a length many times the diameter of the chuck which (3o-operates with the knives and the part carrying' the knives, and the consequence is that when the pipe to be cutoff is secured in my chuck the part carrying the knives and rotating on the chuck can be spun around by hand, the weight and the length of the arms of the stock carrying the knives adding greatly to the practical efficiency and convenience of my device. In Burins patent, on the contrary, the head carrying the knives is rotated either by a crank and gears or by handspikes,-and it is apparent from this patent that the idea of providing the tool-carryin g portion of the device with integral handles or arms the weight and length of which are made use of in cutting off the pipe is not suggested by Burin. This is a radical difference between the two devices.

XVhat I claim isw.

1. Stock A, having an opening, c, in combination with the tool-carriers A', mounted in stock A on opposite sides of the opening a, and screw-rods a2, mounted in stock A and secured to tool-carriers A to move the tool-carriers toward and away from the openin g a in the stock, substantially as and for the purpose set forth.

2. Stock A, having an opening, a, intermediate the ends of the stock, tool-carriers A', mounted in the stock A, one on each side of the opening a, and means,substantially such as described, for moving the carriers toward and away from the opening a, in combination with a chuck, A3, stock A and chuck A being connected together, so that one can be rotated on the other, the opening a in stock A being located in relation to the jaws of the chuck, substantially as shown, and stock A being' eX- tended into handles, substantially as and for the purpose set forth.

3. In a device substantially such as described, stock A, having an opening, a, and a recess, c', portions of the side walls of which are parallel, in combination with carrier A,

having parallel' edges 3 and mounted in the recess a', and screw-rods a2, connected to carriers A and mounted in the stock A, the carriers being on opposite sides of the opening' a in stock A, all substantially as and for the purpose set forth.

et. In a device, substantially such as described, carrierA, in combination with forked plate a9, having arms al, substantially as and for the purpose set forth.

ALBERT IV. BARTHOLOMEV.

IVitnesses:

EDWARD 8. BEACH, JOHN R. SNOW.

IOO 

